最后以变频器经受电压凹陷特性的研究示例说明该装置的应用价值。
The experiment of researching character of the transducer during voltage sag is carried through, which shows the application value.
反之，当H 0大到一定程度时，受电机效率下降和调速系统本身效率的影响，采用变频调速可能不节能甚至反而增加能源浪费。
Conversely, when H0 large to a certain extent, the decline in motor efficiency and speed efficiency of the system itself, using energy-saving VVVF may not even increase instead of wasting energy.
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